LOL, this is one that hits so close to home. Just last month I was doing the same thing, tearing through my quilting closet looking for my pressing sheet. Never did find it so ended up buying another at LQS when I was there a couple of weeks later. I know it will appear when I least expect it to. Then last week I was looking for a spool of thread that was for my hand applique I'm working on, again couldn't find it, went through thread bins 3 times and then an aha moment it was on my sewing machine I use for quilting classes.